I bought it a month ago and that is not enough time to see how it is over the long haul. I Needed to have a blender that would pulverize the seeds in hot sauce. The old one we had would not do it. The food processor would not do it. But the Ninja did. And did a lot of hot sauce. I know that the vent on the back and the fan to keep it cool helps. Love the glasses to make smoothies with. Works great. So far a great blender.